I did it, back in 1989 (and have the certificate around here somewhere to prove it).
My tips:
- Eat little or nothing the week before you go.
- Drink only from one small glass of tea with no ice during the meal - just enough liquid to keep you from choking if a piece of meat gets stuck in your throat.
- Don't add any extra butter, sour cream, or chives to the baked potato. (You have to eat all the trimmings too).
- Don't try to eat the whole thing in the first 10 minutes. You get an hour to do it - use as much of the hour as you can.
- Eat the food that will pack most densely in your stomach first and leave the steak for last. (Cut-up pieces of steak take up a lot more room in your stomach, and if you eat it first, you'll feel fuller).